定量研究人体蠕形螨在面部的感染度及分布

QUANTITATIVE STUDY ON INFESTATION AND DISTRIBUTION OF HUMAN DEMODEX ON THE FACE

1.采用透明胶带1.2cm×5cm(6cm^2)定量、规定部位定点的方法,粘贴过夜,镜检计数研究人体蠕形螨在面部24条胶带的总感染度,结果健康人中1例重度感染者高达618只螨,平均每条胶带25.8只。2.研究蠕形螨在面部的分布,根据13个部位的比较,颊下114、颏78、额59.5、鼻55、眶下54.5、口旁50、鼻沟45、耳旁34,5、口上25、下颚24.5、鬓角23.5。发现毛囊蠕形螨各部位差别显著,以颊部最多,颏、额、鼻、眶下、鼻沟次之。皮脂蠕形螨在面部分布较均匀,仍以颊部为多。3.建议流行病学调查时以定量定点透明胶带法为规范化蠕形螨检查方法。

We have tried to use 1.2cm × 5cm (6cm2) adhesive cellophane tape technique for quantitative detection of Demodex. 618 mites were detected on the 24 tapes applied on various parts of the face of a healthy individual.In an investigation of 8 person-times, the numbers of mites found on various parts of the face were in the following order: upper-cheek(233), mid-cheek(153), lower-cheek (114), chin(78), forehead(59.5), nose(55), infraorbital(54.5), paraoral(49.5), nasal groove(45), mites found on other parts being negligible.Demodex brevis were found scattering singly on the tapes, while D. follicutorum were found 1-6 in number in one or several follicles. All of them were in the follicle opening, indicating that transmission was readily affected through direct or indirect contacts.The results also showed that when a large number of mites were sticked off, the intensity of infestation was decreased.